I use the Abyss 36V 105AH battery with a Rhodan 120 lb thrust trolling motor. This charger is permanently installed on my Key West 244 CC and keeps the battery at tip top shape. If you are buying an Abyss battery, this is the charger to use. It just works and is build very solid. I do not use engine power to recharge, only this charger. It gets a workout and is blistering fast at recharges.
Although it took a while to get my new battery and charger, the performance has been amazing with a 36v Motorguide Xi5 electric motor! 105 AH battery with 4 x 5 hour trips trolling for walleye at 1.5 MPH still at 37% SOC! Love the Bluetooth data on my phone to monitor battery performance.